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Daikin VRV III-S RXYMQ36 48PVJU Service Manual Page 180

60 hz.
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SiUS34-907
P4
3.35 "
" Malfunction of Inverter Radiating Fin Temperature
Rise Sensor
P4
Remote
Controller
Display
Applicable
RXYMQ36 · 48PVJU
Models
Method of
Resistance of radiation fin thermistor is detected when the compressor is not operating.
Malfunction Decision Conditions:
Malfunction
When the resistance value of thermistor becomes a value equivalent to open or short circuited
Detection
status
 Malfunction is not decided while the unit operation is continued.
 Defect of radiator fin temperature sensor
Supposed
 Defect of main PCB (A1P)
Causes
 Faulty inverter compressor
 Faulty fan motor
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Measure resistance value of the
radiation fin thermistor. *
thermistor resistance
compressor's insulation
resistance is not more
motor's insulation
resistance is not more
malfunction recur when
Troubleshooting
P4
"
" will be displayed by pressing the inspection button.
* Disconnect the connector (X111A) from the fin
thermistor, and then check the thermistor.
Is the
NO
value normal?
YES
The INV.
YES
than 100kW.
NO
The fan
YES
than 1MW.
NO
Does the
YES
the power supply
turns ON?
NO
Troubleshooting by Indication on the Remote Controller
Replace the main PCB (A1P).
Replace the compressor (M1C).
Replace the fan motor.
Replace the main PCB (A1P).
Continue operation.
171

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    RXYQ18PAY6 service manual & vrv Fulform